feat(blog): add file-based blog with dynamic slugs, MDX content and layout shell

- Introduced blog routing using Next.js App Router
- Implemented dynamic [slug] pages for blog posts
- Added MDX-based content loading via lib/posts
- Integrated shared TopBar layout with navigation
- Established clear content, lib and component separation

apps/public-web/node_modules/next/dist/next-devtools/shared/webpack-module-path.d.ts

@@ -0,0 +1,10 @@
+export declare function isWebpackInternalResource(file: string): boolean;
+/**
+ * Format the webpack internal id to original file path
+ *
+ * webpack-internal:///./src/hello.tsx => ./src/hello.tsx
+ * webpack://_N_E/./src/hello.tsx => ./src/hello.tsx
+ * webpack://./src/hello.tsx => ./src/hello.tsx
+ * webpack:///./src/hello.tsx => ./src/hello.tsx
+ */
+export declare function formatFrameSourceFile(file: string): string;